Hi, in the issue I filed against nipype I was asked to try to rebuild numpy and see whether this might make a diffence. So I tried
dget http://deb.debian.org/debian/pool/main/n/numpy/numpy_1.19.5-1.dsc cd numpy-1.19.5 and have rebuild it in a recent pbuilder environment. This ends up in DISTUTILS.rst.txt:386: WARNING: Unparseable C cross-reference: '/**end repeat1**/' Invalid C declaration: Expected identifier in nested name. [error at 0] /**end repeat1**/ ^ Traceback (most recent call last): File "/usr/lib/python3/dist-packages/sphinx/cmd/build.py", line 280, in build_main app.build(args.force_all, filenames) File "/usr/lib/python3/dist-packages/sphinx/application.py", line 337, in build self.builder.build_update() File "/usr/lib/python3/dist-packages/sphinx/builders/__init__.py", line 293, in build_update self.build(to_build, File "/usr/lib/python3/dist-packages/sphinx/builders/__init__.py", line 357, in build self.write(docnames, list(updated_docnames), method) File "/usr/lib/python3/dist-packages/sphinx/builders/__init__.py", line 531, in write self._write_serial(sorted(docnames)) File "/usr/lib/python3/dist-packages/sphinx/builders/__init__.py", line 541, in _write_serial self.write_doc(docname, doctree) File "/usr/lib/python3/dist-packages/sphinx/builders/html/__init__.py", line 626, in write_doc self.docwriter.write(doctree, destination) File "/usr/lib/python3/dist-packages/docutils/writers/__init__.py", line 78, in write self.translate() File "/usr/lib/python3/dist-packages/sphinx/writers/html.py", line 70, in translate self.document.walkabout(visitor) File "/usr/lib/python3/dist-packages/docutils/nodes.py", line 214, in walkabout if child.walkabout(visitor): File "/usr/lib/python3/dist-packages/docutils/nodes.py", line 214, in walkabout if child.walkabout(visitor): File "/usr/lib/python3/dist-packages/docutils/nodes.py", line 214, in walkabout if child.walkabout(visitor): [Previous line repeated 1 more time] File "/usr/lib/python3/dist-packages/docutils/nodes.py", line 206, in walkabout visitor.dispatch_visit(self) File "/usr/lib/python3/dist-packages/sphinx/util/docutils.py", line 477, in dispatch_visit method(node) File "/usr/lib/python3/dist-packages/sphinx/writers/html5.py", line 417, in visit_literal_block highlighted = self.highlighter.highlight_block( File "/usr/lib/python3/dist-packages/sphinx/highlighting.py", line 149, in highlight_block lexer = self.get_lexer(source, lang, opts, force, location) File "/usr/lib/python3/dist-packages/sphinx/highlighting.py", line 127, in get_lexer lexer = lexer_classes[lang](**opts) TypeError: 'NumPyLexer' object is not callable Exception occurred: File "/usr/lib/python3/dist-packages/sphinx/highlighting.py", line 127, in get_lexer lexer = lexer_classes[lang](**opts) TypeError: 'NumPyLexer' object is not callable The full traceback has been saved in /tmp/sphinx-err-h3bd2cwr.log, if you want to report the issue to the developers. Please also report this if it was a user error, so that a better error message can be provided next time. A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks! While I think this could be worth a "does not build from source" bug against numpy (I'd wait with this until somebody confirms) I wonder what answer I should give to nipype upstream in the issue[1]. Kind regards Andreas. [1] https://github.com/nipy/nipype/issues/3382 -- http://fam-tille.de